Wi-Fi calling is an operator specific feature. Your operator doesn’t support it.
- I cannot share my Lumia’s internet connection with another device
- I cannot connect to the internet using a mobile data connection on my Lumia phone
- How do I switch from a mobile version of the webpage to a desktop version on my Lumia?
- How can I reduce a data usage on my Lumia phone?
- I have seen a change in Wi-Fi connection signal strength after the update was applied to my Lumia.